Question

- Which type of hypothesis test would we use to analyze data from the following scenarios? Why? (Choose from paired t-test, 2-sample t-test, ANOVA, or Chi-square test)

- A researcher wants to know if there is an association of gender (male, female) and eye color (brown, blue, grey, green). Which test would he use to determine if gender and eye color are independent in his data set?
- A business owner wants to determine if her seminar is effective in training new employees. She gives a pretest before the seminar and a post test after the seminar to see if there is a significant.
- A nurse wants to know if there is a difference in the average number of days in the hospital of patients that have no health insurance, public health insurance, or private health insurance. What test would the nurse use to determine if there is a difference in the average number of hospital days by insurance type?

Answer #1

**Answer A)**

For finding association between gender and eye color, Chi square test is suitable. This is because both the variables are categorical.

**Answer B)**

For finding the effectiveness of training program, paired t-test is suitable. This is because in this case same test of same respondents is taken before and after seminar.

**Answer C)**

In this case, ANOVA is suitable as nurse wants to compare mean number of days for 3 groups (no health insurance, public health insurance, or private health insurance).

In each of the following scenarios, determine if the data are
paired.
(a) We would like to know if Intel's stock and Southwest Airlines'
stock have similar rates of return. To find out, we take a random
sample of 50 days, and record Intel's and Southwest's stock on
those same days.
paired
not paired
(b) We randomly sample 50 items from Target stores and note the
price for each. Then we visit Walmart and collect the price for
each of...

For the following,
indicate what type of analysis (test) you would perform and what
alternative hypothesis you are testing. If you think a directional
test is appropriate, make sure you incorporate this in the
alternative hypothesis. In your answer, please indicate 2 things:
the type of analysis AND the alternative hypothesis
You measure both
length and width of three species of barnacle. You are trying to
figure out if there is a difference between these three species.
You measure 22...

Which hypothesis test do I use for this statement?
It is believed that the blue team is 3 inches taller than the
red team. (for my data, in one column i have their heights and team
color in another column)
For my null and alternative hypothesis, how do I find those?
I was thinking take the difference of the means since we are
testing whether one team is 3 inches taller? For example, null is
u1-u2= 0, alternative is u1-u2=...

What Statistical Test Should I Use
Please indicate the type of test needed to analyze the data
described.
Hints: Think about the IV and DV. How many levels of
the IV? Are they repeated measures? Are the data
categorical?
A. z-test
B. One-Sample t-Test
C. Dependent Measures t-Test
D. Independent Measures t-Test
E. One-way ANOVA
E. One-way ANOVA
F. Post-hoc tests
G. Between-Subjects Factorial ANOVA
H. Chi-Square test of Independence
________ 1. Compare spatial task scores after 0 or 3 drinks....

or the following, indicate what type of analysis (test) you
would perform and what alternative hypothesis you are testing. If
you think a directional test is appropriate, make sure you
incorporate this in the alternative hypothesis. In your answer,
please indicate 2 things: the type of analysis AND the alternative
hypothesis Important: You may not know how to do the correct
analysis. If this is the case, simply write “talk to a
statistician” or “I wasn't taught this” as the...

For each of the following hypothetical situations, you are to
indicate which type of test statistic you should use (choosing from
single sample z, single sample t, independent samples t, or paired
t). Also for each, you need to indicate your rationale for
selecting that particular test.
(a) A researcher wants to determine if the mean age of her 85
survey respondents is similar to the mean age of the 200 people to
whom she sent the survey. Mean age...

What statistical analysis type would you use for the following
data (2 sampled unpaired t test, 1 sample z test, logistic
regression, etc).
Do an analysis of the multitasking activity from the ClassData
sheet: comparing the time to type or write abcd…z and 123…26 to the
time for 1a2b3c…26z.

State which hypothesis test would be appropriate under the
following conditions. We know that our two data sets come from
approximately normally distributed populations and that they have
very different variances.
The Answer Options are:
2-sample t-test with unequal variances
2-sample t-test with equal variances
t-test Mann-Whitney
U Test
z-test

Choosing a hypothesis test: For each of the following three
scenarios, state which hypothesis test you would use from among the
four introduced so far: the z test, the single-sample t test, the
paired sample t test, and the independent-samples t test. (Note: In
the actual of these tests, often because the actual experiment had
additional variables.) Explain your answer.
A study of 40 children who had survived a brain tumor revealed
that the children were more likely to have...

Part 1 Hypothesis Test and Confidence Interval from 1 sample
Test ONE claim about a population parameter by collecting your
own data or using our class survey data. Include your
written claim, hypothesis in both
symbolic and written form, relevant statistics
(such as sample means, proportions etc.), test
statistic, p-value (or critical value),
conclusion, and interpretation of
your conclusion in the context of your claim. Use a 0.05
significance level.
You will also construct a 95% confidence interval
estimate of...

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